18 加法 2 等于多少？
18 + 2 = 20
18加法2 等于 20
竖式演算
验算
- 用减法验算：20 − 2 = 18
- 用减法验算：20 − 18 = 2
相关题目
18 + 1 = 19
18 + 3 = 21
18 + 4 = 22
18 + 5 = 23
18 + 6 = 24
18 + 7 = 25
18 + 8 = 26
18 + 9 = 27
17 + 2 = 19
19 + 2 = 21
20 + 2 = 22
16 + 2 = 18
21 + 2 = 23
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22 + 2 = 24
14 + 2 = 16
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2 + 18 = 20
3 + 17 = 20
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5 + 15 = 20
6 + 14 = 20
3 + 47 = 50
1 + 59 = 60
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50 + 92 = 142
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74 - 54 = 20